As you might know, water includes Oxygen. Without Oxygen, we would die because we cannot breathe and water wouldn't exist so we are lucky that Oxygen exist. Water has a chemical formula of "H2O" of which the "O" means Oxygen. Another common compound of Oxygen is iron oxide which is rust. The chemical formula of iron oxide is "Fe2O3" of which the "O3" is Oxygen.
Common compounds with oxygen
As you might know, water includes Oxygen. Without Oxygen, we would die because we cannot breathe and water wouldn't exist so we are lucky that Oxygen exist. Water has a chemical formula of "H2O" of which the "O" means Oxygen. Another common compound of Oxygen is iron oxide which is rust. The chemical formula of iron oxide is "Fe2O3" of which the "O3" is Oxygen.
Atomic project - Oxygen